Abstract: An image forming apparatus comprising: a plurality of photoconductors; a plurality of exposure unis each corresponding to a different one of the plurality of photoconductors, each of the plurality of exposure units including a substrate on which a plurality of light emitting portions configured to emit light to expose the photoconductors, and a duct configured to guide an airflow that cools the substrate along the substrate; a fan configured to generate the airflow that cools the substrate; and a duct unit configured to communicate with the ducts of the plurality of exposed portions via different ones of a plurality of openings, wherein an area of a first opening that is a longest flow path from the fan among the plurality of openings is larger than an area of a second opening that is a shortest flow path from the fan among the plurality of openings.

Abstract: An image forming including: a photoconductor; an exposure unit including a substrate provided with a plurality of light emitting portions configured to emit light to expose the photoconductor, and a first duct configured to guide an airflow that cools the substrate from one side to another side in a longitudinal direction of the substrate along the substrate; an IC mounted on the substrate; a fan configured to generate an airflow that cools the substrate; and a second duct configured to communicate with the first duct through a first opening portion, and guide the airflow generated by the fan, the first opening portion is located on the one side with respect to the center of the substrate in the longitudinal direction of the substrate, and the IC is located between the center of the substrate in the longitudinal direction and the first opening portion.

Abstract: An image forming apparatus includes: a photoconductor that rotates about a first axis; an exposure portion that includes a substrate that includes a plurality of light emitting portions for exposing a surface of the photoconductor, and a support portion for supporting the substrate, and that moves between an exposure position where the photoconductor is exposed and a retracted position where the photoconductor is retracted from the exposure position; and a rotational member that has a second axis along the first axis, and that moves the exposure portion between the retracted position and the exposure position by rotation about the second axis.

Abstract: A cleaning rod includes a rod-like member, a slidable portion which is provided on a free end side of the rod-like member with respect to a direction in which the cleaning rod is inserted and which is slidable on a light emergent surface of a lens of an image forming apparatus, and a restricting portion configured to restrict movement of the slidable portion in a direction away from the light emergent surface with respect to an optical axis direction by contacting the holder at each of free ends of opposing wall portions of a holder of the image forming apparatus from a side opposite from a side where a photosensitive member of the image forming apparatus is provided with respect to the optical axis direction in a state in which the slidable portion contacts the light emergent surface.

Abstract: An image forming apparatus includes: a photoconductor that rotates about a first axis; an exposure portion that includes a substrate that includes a plurality of light emitting portions for exposing a surface of the photoconductor, and a support portion for supporting the substrate, and that moves between an exposure position where the photoconductor is exposed and a retracted position where the photoconductor is retracted from the exposure position; and a rotational member that has a second axis along the first axis, and that moves the exposure portion between the retracted position and the exposure position by rotation about the second axis.

Abstract: An image forming apparatus includes: a photoconductor; a charging portion that charges a surface of the photoconductor; an exposure portion including a substrate including a plurality of light emitting portions for exposing the photoconductor; a developing portion that develops a latent image formed on the surface of the photoconductor with toner; a fan that generates an airflow for cooling the exposure portion; and a duct that communicates with the fan and communicates with the support portion, the duct guiding the airflow generated by the fan to the substrate; in which a part of the duct is formed by a charging support portion that supports the charging portion, a developing support portion that supports the development, and a duct portion, and a space between the duct portion and the charging support portion and a space between the duct portion and the developing support portion are sealed by a sealing member.

Abstract: An image forming apparatus includes: a rotatable photoconductor; an exposure portion including a substrate on which a plurality of chips each including a plurality of light emitting portions that emit light for exposing the photoconductor is mounted, and a support portion configured to support the substrate; a fan configured to generate an airflow for cooling the exposure portion; and a duct configured to communicate with the fan and to communicate with the support portion to guide the airflow generated by the fan to the substrate.

Abstract: An image forming apparatus includes an exposure unit that exposes a photoconductor; and an exposure support member that includes a support portion that detachably supports the exposure unit and is moved integrally with the exposure unit in a first direction orthogonal to an axial direction of the photoconductor, wherein the exposure unit includes a first engagement portion that is formed on an opposing portion facing the support portion of the exposure support member in the first direction so as to protrude toward the exposure support member and further formed to extend in the axial direction of the photoconductor orthogonal to a protruding direction, the exposure support member includes a second engagement portion that is formed on the support portion facing the exposure unit at a position corresponding to the first engagement portion and engages with the first engagement portion.

Abstract: An image forming apparatus includes: a rotatable photoconductor; an exposure portion including a substrate on which a plurality of chips each including a plurality of light emitting portions that emit light for exposing the photoconductor is mounted, and a support portion configured to support the substrate; a fan configured to generate an airflow for cooling the exposure portion; and a duct configured to communicate with the fan and to communicate with the support portion to guide the airflow generated by the fan to the substrate.

Abstract: An image forming apparatus includes: a photoconductor; a charging portion that charges a surface of the photoconductor; an exposure portion including a substrate including a plurality of light emitting portions for exposing the photoconductor; a developing portion that develops a latent image formed on the surface of the photoconductor with toner; a fan that generates an airflow for cooling the exposure portion; and a duct that communicates with the fan and communicates with the support portion, the duct guiding the airflow generated by the fan to the substrate; in which a part of the duct is formed by a charging support portion that supports the charging portion, a developing support portion that supports the development, and a duct portion, and a space between the duct portion and the charging support portion and a space between the duct portion and the developing support portion are sealed by a sealing member.

Abstract: An image forming apparatus includes an exposure unit that exposes a photoconductor; and an exposure support member that includes a support portion that detachably supports the exposure unit and is moved integrally with the exposure unit in a first direction orthogonal to an axial direction of the photoconductor, wherein the exposure unit includes a first engagement portion that is formed on an opposing portion facing the support portion of the exposure support member in the first direction so as to protrude toward the exposure support member and further formed to extend in the axial direction of the photoconductor orthogonal to a protruding direction, the exposure support member includes a second engagement portion that is formed on the support portion facing the exposure unit at a position corresponding to the first engagement portion and engages with the first engagement portion.

Abstract: An image forming apparatus includes: a photoconductor; an exposure portion that exposes the photoconductor; a fan that generates an airflow for cooling the exposure portion; a duct portion that communicates with the fan; and an elevating duct that relatively moves with respect to the duct portion integrally with the exposure portion, in which the elevating duct includes a rib protruding in a direction away from the exposure portion in a vertical direction, the duct portion includes a sealing member surrounding an opening portion that communicates with the elevating duct, when the elevating duct is located at an exposure position, a surface of the rib intersecting a rotation axis of the photoconductor is in contact with the sealing member, and when the elevating duct is located at a retracted position, a surface of the rib intersecting with the rotation axis of the photoconductor is in contact with the sealing member.

Abstract: An image forming apparatus having front and rear surfaces, a photoreceptor having a rotation axis extending in a first direction, an exposure unit, and a cooling unit. The exposure unit includes a substrate having a longitudinal axis extending in the first direction, a first surface and a second surface. A plurality of light emitting elements that emit light toward the photoreceptor are mounted on the first surface of the substrate. The cooling unit includes an intake port that sucks air from outside of the image forming apparatus The intake port is disposed at an intake port distance in the first direction to the rear surface. The intake port distance is shorter than a distance in the first direction of a center of the substrate to the rear surface. The cooling unit cools the substrate by blowing air sucked by the intake port onto the second surface of the substrate.

Abstract: A holding member includes a first side wall portion and a second side wall portion, and a part of a surface of a substrate on a side opposite from a mounting surface and a holding member are fixed to each other by an adhesive. In the first side wall portion, an inserting hole is disposed opposing a corner portion as of the substrate in a widthwise direction of the substrate and also, in the second side wall portion, another inserting hole is disposed opposing another corner portion of the substrate.

Abstract: There is provided an optical print head including: a substrate on which a plurality of light emitting elements is mounted on one surface, and a plurality of electronic components including a driver IC that drives the plurality of light emitting elements is mounted on the other surface opposite to the one surface; and a lens array including a plurality of lenses that respectively condenses light emitted from the plurality of light emitting elements to a photosensitive drum. The substrate includes a plurality of connecting pieces obtained by cutting a connecting portion with another substrate in a longitudinal direction of the substrate, and at least one of the connecting pieces is provided at a position corresponding to a region of the substrate where the driver IC is to be mounted in the longitudinal direction of the substrate.

Abstract: An image forming apparatus comprising: a plurality of photoconductors; a plurality of exposure unis each corresponding to a different one of the plurality of photoconductors, each of the plurality of exposure units including a substrate on which a plurality of light emitting portions configured to emit light to expose the photoconductors, and a duct configured to guide an airflow that cools the substrate along the substrate; a fan configured to generate the airflow that cools the substrate; and a duct unit configured to communicate with the ducts of the plurality of exposed portions via different ones of a plurality of openings, wherein an area of a first opening that is a longest flow path from the fan among the plurality of openings is larger than an area of a second opening that is a shortest flow path from the fan among the plurality of openings.

Abstract: An image forming including: a photoconductor; an exposure unit including a substrate provided with a plurality of light emitting portions configured to emit light to expose the photoconductor, and a first duct configured to guide an airflow that cools the substrate from one side to another side in a longitudinal direction of the substrate along the substrate; an IC mounted on the substrate; a fan configured to generate an airflow that cools the substrate; and a second duct configured to communicate with the first duct through a first opening portion, and guide the airflow generated by the fan, the first opening portion is located on the one side with respect to the center of the substrate in the longitudinal direction of the substrate, and the IC is located between the center of the substrate in the longitudinal direction and the first opening portion.

Abstract: An image forming apparatus includes: a photoconductor; an exposure unit that forms a latent image on the photoconductor by a substrate that is long in a rotational axis direction of the photoconductor and a plurality of light emitting elements arranged in a longitudinal direction of the substrate; a connector for energizing the exposure unit, the connector being arranged at a position biased to one end side from the center in the longitudinal direction of the substrate; and an exposure cooling unit that causes an airflow to flow through an opening formed in the exposure unit to cool the exposure unit, in which in the longitudinal direction of the substrate, the opening is located on the other end side from the connector, and a shielding wall is provided between the opening and the connector.

Abstract: An image forming apparatus includes: a photoconductor; a charging portion that charges a surface of the photoconductor; an exposure portion including a substrate including a plurality of light emitting portions for exposing the photoconductor; a developing portion that develops a latent image formed on the surface of the photoconductor with toner; a fan that generates an airflow for cooling the exposure portion; and a duct that communicates with the fan and communicates with the support portion, the duct guiding the airflow generated by the fan to the substrate; in which a part of the duct is formed by a charging support portion that supports the charging portion, a developing support portion that supports the development, and a duct portion, and a space between the duct portion and the charging support portion and a space between the duct portion and the developing support portion are sealed by a sealing member.

Abstract: An image forming apparatus includes: a photoconductor; an exposure portion that exposes the photoconductor; a fan that generates an airflow for cooling the exposure portion; a duct portion that communicates with the fan; and an elevating duct that relatively moves with respect to the duct portion integrally with the exposure portion, in which the elevating duct includes a rib protruding in a direction away from the exposure portion in a vertical direction, the duct portion includes a sealing member surrounding an opening portion that communicates with the elevating duct, when the elevating duct is located at an exposure position, a surface of the rib intersecting a rotation axis of the photoconductor is in contact with the sealing member, and when the elevating duct is located at a retracted position, a surface of the rib intersecting with the rotation axis of the photoconductor is in contact with the sealing member.